Game.enemy = function(viewWidth) {
	this.type = Math.floor(Math.random() * 300);
	this.isAlive = true;

	this.img = new Image();

	if (this.type <150) {
		this.img.src = './images/enemy_03.png';
		this.blood = 1;
		this.width = 38;
		this.height = 27;
	} else if (this.type <250) {
		this.img.src = './images/enemy_02.png';
		this.blood = 3;
		this.width = 69;
		this.height = 89;
	} else if (this.type <300) {
		this.img.src = './images/enemy_01.png';
		this.blood = 10;
		this.width = 108;
		this.height = 164;
	}

	this.x = Math.floor(Math.random() * (viewWidth - this.width));
	this.y = 0 - this.height;
}

Game.enemy.prototype.move=function () {
	this.y+=5;
}